CN116123213A - Function integrated hub bearing unit - Google Patents

Function integrated hub bearing unit Download PDF

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Publication number
CN116123213A
CN116123213A CN202211641850.0A CN202211641850A CN116123213A CN 116123213 A CN116123213 A CN 116123213A CN 202211641850 A CN202211641850 A CN 202211641850A CN 116123213 A CN116123213 A CN 116123213A
Authority
CN
China
Prior art keywords
hub
bearing
ring
air
bearing unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211641850.0A
Other languages
Chinese (zh)
Inventor
赵毅慧
李毅
张宏伟
赵金柱
李鑫勇
张印
韩建波
刘东生
刘宛莹
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Inner Mongolia First Machinery Group Corp
Original Assignee
Inner Mongolia First Machinery Group Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inner Mongolia First Machinery Group Corp filed Critical Inner Mongolia First Machinery Group Corp
Priority to CN202211641850.0A priority Critical patent/CN116123213A/en
Publication of CN116123213A publication Critical patent/CN116123213A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0015—Hubs for driven wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0078—Hubs characterised by the fixation of bearings
    • B60B27/0084—Hubs characterised by the fixation of bearings caulking to fix inner race
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0078—Hubs characterised by the fixation of bearings
    • B60B27/0089—Hubs characterised by the fixation of bearings caulking to fix outer race
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C37/00—Cooling of bearings
    • F16C37/007—Cooling of bearings of rolling bearings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The invention relates to a functional integrated hub bearing unit which mainly comprises a wheel valve assembly, a hub assembly, an inner ring torque transmission shaft, an outer bearing rolling ring, an outer ring supporting shaft, an inner bearing rolling ring and an auxiliary functional integrated block, wherein the outer bearing rolling ring is arranged on the outer ring supporting shaft; the end cover of the wheel valve assembly is fixedly connected with the left end face of the hub assembly, the inner ring torque transmission shaft is formed by connecting a main reducer frame and a wheel shaft supporting the inner ring of the bearing, and the hub assembly is fixedly connected with the main reducer frame; the outer surface of the wheel axle is in interference fit with the outer bearing rolling ring and the inner ring of the inner bearing rolling ring; the outer ring support shaft is provided with a bearing outer raceway which is respectively connected with the outer bearing rolling ring and the inner bearing rolling ring in a matching way. According to the invention, by utilizing the hollow available space of the high-power inner rotor hub motor and adopting a structure mode of functional multiplexing and space sharing overlapping, the torque transmission and bearing compatibility is realized, the optimization of the bearing structure of the electric driving wheel is improved, and the axial size is made shorter.

Description

Function integrated hub bearing unit
Technical Field
The invention belongs to the technical field of hub motors, and particularly relates to a functional integrated hub bearing unit.
Background
With the rapid development of the ground equipment system to modularization, intellectualization and autonomy, the distributed driving technology based on the wheel hub motor is an important trend of the development of a new generation of wheeled vehicles, and as the driving system is formed by a plurality of wheels, the system has the optimal degree of freedom of dynamic control, is convenient for realizing various complex dynamic control functions, and becomes one of the accepted optimal schemes for improving the global capacity of the wheeled vehicles. The high-power hub motor driving system integrates the functions of driving, braking, decelerating, supporting, controlling and the like because of introducing a motor into the tire, and has a structure which is greatly different from the traditional hub driving. The existing hub bearing for the electric driving wheel of the high-power heavy-duty vehicle basically adopts a traditional bearing supporting structure, and adopts paired tapered rollers or angular contact ball bearings for independent installation and debugging.
The existing high-power electric driving wheel hub bearing adopts a conventional end or reducer end bearing arrangement structure, so that the axial occupied space is larger, and the axial dimension of the electric driving wheel becomes longer due to the introduction of the hub motor, so that the arrangement of the overall and suspension assembly is not facilitated; the simple bearing integrated structure is adopted, but the characteristics of an electric driving wheel (namely, a hub motor is additionally arranged compared with the prior art) are not considered, only the simple integration of the inner ring and the outer ring of the bearing is realized, and meanwhile, the force on the central line of the tire under the action of the load of the whole automobile is biased due to the arrangement of the bearing close to the joint surface of the hub and the rim, so that the service life of the bearing is not favorable; meanwhile, the hub bearing is not used for being highly integrated with other parts of the electric driving wheel and forming functional modularization, the space utilization rate is not high, the future development direction of the integration, the light weight and the modularization of the electric driving wheel is not met, and the long-term application potential is not realized.
Disclosure of Invention
The invention provides a hub bearing unit with integrated functions, which solves the defects of the prior art.
In order to solve the technical problems, the invention provides a hub bearing unit with integrated functions, which is characterized in that: the wheel valve mainly comprises a wheel valve assembly 2, a hub assembly 3, an inner ring torque transmission shaft 4, an outer ring bearing rolling ring 5, an outer ring supporting shaft 6, an inner ring bearing rolling ring 7 and an auxiliary function integrated block 8; the end cover of the wheel valve assembly 2 is fixedly connected with the left end face of the hub assembly 3, the inner ring torque transmission shaft 4 is formed by connecting a main reducer frame 23 and a wheel shaft 25 supporting the inner ring of a bearing, and the hub assembly 3 is fixedly connected with the main reducer frame; the outer surface 32 of the axle 25 is in interference fit with the inner rings of the outer bearing race 5 and the inner bearing race 7; the outer ring support shaft 6 is provided with a bearing outer raceway which is respectively connected with the outer bearing rolling ring 5 and the inner bearing rolling ring 7 in a matching way, and an auxiliary function integrated block 8 for a central inflation and deflation system is arranged in the inner hole at the right end of the outer ring support shaft 6.
The beneficial effects are that: the invention realizes the compatibility of torque transmission and bearing by utilizing the hollow available space of the high-power inner rotor hub motor and adopting a structure mode of functional multiplexing and space sharing overlapping, improves the optimization of the bearing structure of the electric driving wheel, makes the axial dimension shorter, integrates the functional components of a central inflation and deflation system, an ABS speed measuring functional component, a transmission respirator and the like, and forms a hub bearing unit suitable for the requirements of different modification vehicles by the operation characteristics conversion of an inner ring module and an outer ring module, thereby providing a hub bearing unit with reliable performance and light weight function integration for the electric driving wheel of the high-power special electric driving vehicle. Compared with the prior art, the compact, light-weight, high-space utilization and high-reliability supporting and torque transmission bearing unit structure is realized.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic illustration of a wheel valve assembly;
FIG. 3 is a schematic illustration of a hub assembly;
FIG. 4 is a schematic diagram of an inner ring torque transmission shaft structure;
FIG. 5 is a schematic view of the outer race support shaft structure;
FIG. 6 is a schematic diagram of the auxiliary function integrated block.
Detailed Description
To make the objects, contents and advantages of the present invention more apparent, the following detailed description of the specific embodiments of the present invention will be given.
The invention provides a functional integrated hub bearing unit 1, which mainly comprises a wheel valve assembly 2, a hub assembly 3, an inner ring torque transmission shaft 4, an outer bearing rolling ring 5, an outer ring support shaft 6, an inner bearing rolling ring 7, an auxiliary functional integrated block 8 and a locking nut 9;
the hub motor, the speed reducer and the brake are arranged in the middle of the functional integrated bearing unit 1, namely, the hub assembly 3 and an outer ring support shaft 6 with an end flange, the inner ring torque transmission shaft 4 and the shaft part of the outer ring support shaft 6 penetrate through a middle hole part available by the hub motor, and the inner ring torque transmission shaft 4 is a rotating shaft; the outer ring support shaft 6 is a fixed shaft. The outer bearing rolling ring 5 and the inner bearing rolling ring 7 can be arbitrarily selected to have proper distances according to the offset distance requirements of the vehicle and the tire so as to meet the use requirements of the whole vehicle, so that the bearing is more reasonable in bearing and higher in reliability.
The wheel valve assembly 2 comprises an end cover 10, a bolt 11, a wheel valve 12, an end cover spigot 13 and an O-ring groove 14; the outer shell part of the wheel valve 12 is integrated with the end cover 10 into a whole, the end cover 10 is positioned by transition fit with the hub assembly 3 through an end cover spigot 13, and is fixedly connected with the hub assembly 3 through 6 bolts 11; the wheel valve 12 is connected with the tire and inflation and deflation air passage 24, is opened under the action of air pressure during inflation, deflation and detection, and is automatically closed at the end of the action.
An O-ring 15 is arranged in an O-ring groove 14 on the end face of the end cover 10, and the end face seal is formed with the hub assembly 3 to prevent oil from leaking. The wheel valve assembly 2 has functions of inflation and deflation, sealing, fixing and the like.
The hub assembly 3 includes a hub 16, a tire bolt 17. The hub 16 is made of high-strength titanium alloy material, meets the light use requirement, and the tire bolt 17 is of a structure with a straight edge at the end part, and the straight edge part 18 is installed towards the circular arc 19 of the hub 16 and is in interference fit with the hole 20 of the hub 16. Inside the hub 16 are provided with rectangular splines 21 and oil drain holes 22 of centered inside diameter.
The inner ring torque transmission shaft 4 is provided with a main reducer frame 23, an air passage 24, a wheel shaft 25 for supporting the inner ring of a bearing, a locking nut screw thread 26 is arranged at the end part, and a small end is provided with an oil-gas seal matching surface 27 and an external spline 28 connected with the hub assembly 3.
The main frame 23 of the speed reducer is provided with an oil inlet circular arc hole 29, a pin shaft hole 30 and a connecting hole 31 of the auxiliary frame of the speed reducer, which mainly plays a role in lubricating and connecting parts of the speed reducer; the air passage 24 is a through hole with the diameter of not less than 8mm which is communicated from the left side to the right side; the right outer surface 32 of the wheel axle 25 is in interference fit with the inner rings of the outer bearing roller ring 5 and the inner bearing roller ring 7; the external spline 28 is an internal diameter centering spline, the end face of the external spline is provided with 6 threaded holes 33, and the external spline is fixedly connected with the hub assembly 3 through bolts 11, so that a hub, a speed reducer and a wheel shaft are integrated, and the axial size is reduced. Simultaneously, the torque transmission requirement is met.
The outer ring support shaft 6 is provided with bearing outer raceways 34 and 35 which are respectively matched and connected with the outer bearing rolling ring 5 and the inner bearing rolling ring 7, a key slot 36 is arranged in the inner hole at the right end, the outer ring support shaft is matched and connected with the air passage function integrated block 8 for the central air charging and discharging system, and radial rotation is prevented through a radial key slot 37 in the key slot 36. The right side of the key slot 36 is provided with a snap ring groove 38 for assembling the snap ring to fix the integrated block 8 and prevent the axial movement thereof. The right part of the outer ring support shaft 6 is provided with a large flange 39 and a group of fixing holes 40, and can be fixedly connected with the hub motor through bolts for connecting and supporting the hub motor. A group of long circular arc holes 41 are arranged at the same time, which play roles of heat dissipation, weight reduction and reinforcement; the right end of the outer ring support shaft 6 is provided with 10 threaded holes 42 and a spigot 43 for the connection interface of the knuckle suspension.
The outer bearing roller 5 and the inner bearing roller 7 are non-standard, and a standard tapered roller bearing without an outer race may be used.
The auxiliary function integrated block 8 consists of a plug 44, a breather 45, an ABS sensor 46, a large clamping ring 47, an O-shaped ring 48, an oil seal 49, an air seal 50 and a small clamping ring 51. Wherein the bearing pressure of the oil seal 49 is not less than 0.5MPa, the bearing pressure of the air seal 50 is not less than 1MPa, and the highest rotation speed range is 400 r/min-1500 r/min; the pressure bearing of the aerator 45 is not less than 0.3MPa.
The plug 44 is made of high-strength aluminum, is of a cylindrical structure with a radial key 52, and the radial key 52 is matched and connected with the radial key groove 37 of the outer ring support shaft 6 and is axially positioned through a large clamping ring 47; a groove is provided at the left end for mounting an O-ring 48 for radially sealing the oil. The end of the plug 44 is provided with a central air charging and discharging system air inlet interface 53, the outer rings of the oil seal 49 and the air seal 50 are connected in a matched manner through an installation inner hole 54 arranged on the plug 44, and the lip is connected in a matched manner with the air seal matching surface 27 and is axially positioned through a small clamping ring 51. The air inlet interface 53, the air seal 50, the mounting inner hole 54 and the oil-gas seal matching surface 27 form a closed air cavity 55, and air used by the central air charging and discharging system enters the air cavity 55 through the air inlet interface 53, passes through the air passage 24 and enters the wheel valve 12 to provide an air source for the central air charging and discharging system.
The auxiliary function integrated block 8 is simultaneously provided with a breather 45 for balancing the internal and external air pressure of the transmission part, meeting the wading requirement and checking the oil level of the oil through the breather; an ABS sensor is provided for the mechanical structure to determine the tire speed. The function integration block 8 integrates various functional requirements and meets the realization of auxiliary functions of the electric driving wheel.
The lock nut 9 is a nut with a self-locking function and plays a main role in axially locking the outer bearing rolling ring 5 and the inner bearing rolling ring 7, and is mainly characterized in that after the lock nut is fastened according to the screw specification and the required moment requirement, the angle is chamfered back, the reversing angle is the lock nut pitch/(15-35), and locking and looseness prevention can be realized by adopting structures such as spanner pad or lock nut tail deformation.
The invention realizes the compatibility of the torque transmission and bearing functions of the bearing unit by adopting a structure integration mode of function multiplexing and space sharing overlapping, improves the optimization of the bearing structure of the electric driving wheel, shortens the axial dimension, integrates the functional components of a central inflation and deflation system, an ABS speed measurement functional component, a transmission ventilation functional component and the like, and forms the hub bearing unit suitable for the requirements of different deformation vehicles through the operation characteristics conversion of the inner ring module and the outer ring module. The hub bearing unit with reliable performance and light weight and integrated functions is provided for the electric driving wheel of the high-power wheel type special electric transmission vehicle. Compared with the prior art, the compact, light-weight, high-space utilization and high-reliability supporting and torque transmission bearing unit structure is realized.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.

Claims (10)

1. A functional integrated hub-bearing unit, characterized in that: the wheel valve mainly comprises a wheel valve assembly 2, a hub assembly 3, an inner ring torque transmission shaft 4, an outer ring bearing rolling ring 5, an outer ring supporting shaft 6, an inner ring bearing rolling ring 7 and an auxiliary function integrated block 8; the end cover of the wheel valve assembly 2 is fixedly connected with the left end face of the hub assembly 3, the inner ring torque transmission shaft 4 is formed by connecting a main reducer frame 23 and a wheel shaft 25 supporting the inner ring of a bearing, and the hub assembly 3 is fixedly connected with the main reducer frame; the outer surface 32 of the axle 25 is in interference fit with the inner rings of the outer bearing race 5 and the inner bearing race 7; the outer ring support shaft 6 is provided with a bearing outer raceway which is respectively connected with the outer bearing rolling ring 5 and the inner bearing rolling ring 7 in a matching way, and an auxiliary function integrated block 8 for a central inflation and deflation system is arranged in the inner hole at the right end of the outer ring support shaft 6.
2. A functionally integrated hub-bearing unit according to claim 1, characterized in that: the wheel valve assembly 2 comprises an end cover 10 and a wheel valve 12; the outer shell part of the wheel valve 12 is integrated with the end cover 10 into a whole, the end cover 10 is positioned by transition fit with the hub assembly 3 through an end cover spigot 13, and is fixedly connected with the hub assembly 3 through a bolt 11; the wheel valve 12 connects the tire with the inflation and deflation air path.
3. A functionally integrated hub-bearing unit according to claim 2, characterized in that: an O-ring 15 is arranged in an O-ring groove 14 on the end face of the end cover 10, and forms end face seal with the hub assembly 3.
4. A functionally integrated hub-bearing unit according to claim 1, characterized in that: the hub assembly 3 comprises a hub 16 and a tire bolt 17; the hub 16 is internally provided with rectangular splines 21 with centered inner diameters and an oil drain hole 22; the tire bolts 17 are circumferentially and uniformly distributed on the end face of the hub.
5. A functionally integrated hub-bearing unit according to claim 4, characterized in that: hub 16 is a high strength titanium alloy material. The tire bolt is of straight-sided construction with straight-sided end portions 18 mounted toward the circular arc 19 of the hub 16.
6. A functionally integrated hub-bearing unit according to claim 1, characterized in that: the main frame 23 of the speed reducer is provided with an oil inlet circular arc hole 29, a pin shaft hole 30 and a connecting hole 31 of the auxiliary frame of the speed reducer.
7. A functionally integrated hub-bearing unit according to claim 1, characterized in that: the main frame of the speed reducer is connected with the hub assembly 3 through external splines.
8. A functionally integrated hub-bearing unit according to claim 1, characterized in that: the right side part of the outer ring support shaft 6 is provided with a large flange 39 and a group of fixing holes 40 for fixedly connecting with a hub motor; the right end part of the outer ring supporting shaft 6 is connected with a knuckle suspension.
9. A functionally integrated hub-bearing unit according to claim 1, characterized in that: the auxiliary function integrated block 8 mainly comprises a plug 44, a breather 45 arranged on the plug and an ABS sensor 46; the central hole of the plug is provided with an oil seal and an air seal, wherein the bearing pressure of the oil seal 49 is not less than 0.5MPa, the bearing pressure of the air seal 50 is not less than 1MPa, and the highest rotation speed range is 400-1500 r/min; the pressure bearing of the aerator 45 is not less than 0.3MPa.
10. A functionally integrated hub-bearing unit according to claim 9, characterized in that: the plug 44 is made of high-strength aluminum, is of a cylindrical structure with a radial key 52, and the radial key 52 is matched and connected with the radial key groove 37 of the outer ring support shaft 6 and is axially positioned through a large clamping ring 47; the left end is provided with a groove for installing an O-shaped ring 48, the end part of the plug 44 is provided with a central air charging and discharging system air inlet interface 53, the outer rings of the framework of the oil seal 49 and the air seal 50 are connected in a matched manner through an installation inner hole 54 arranged on the plug 44, and the lip part is connected in a matched manner with the oil-gas seal matching surface 27 and is axially positioned through a small clamping ring 51; the air inlet interface 53, the air seal 50, the mounting inner hole 54 and the oil-gas seal matching surface 27 form a closed air cavity 55, and air used by the central air charging and discharging system enters the air cavity 55 through the air inlet interface 53, passes through the air passage 24 and enters the wheel valve 12 to provide an air source for the central air charging and discharging system.
CN202211641850.0A 2022-12-20 2022-12-20 Function integrated hub bearing unit Pending CN116123213A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211641850.0A CN116123213A (en) 2022-12-20 2022-12-20 Function integrated hub bearing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211641850.0A CN116123213A (en) 2022-12-20 2022-12-20 Function integrated hub bearing unit

Publications (1)

Publication Number Publication Date
CN116123213A true CN116123213A (en) 2023-05-16

Family

ID=86294852

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211641850.0A Pending CN116123213A (en) 2022-12-20 2022-12-20 Function integrated hub bearing unit

Country Status (1)

Country Link
CN (1) CN116123213A (en)

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